diff --git a/build/dependencies.props b/build/dependencies.props
index 7cc25af0cd..c3b2506600 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -28,18 +28,18 @@
     <MicrosoftExtensionsPlatformAbstractionsPackageVersion>1.1.0</MicrosoftExtensionsPlatformAbstractionsPackageVersion>
     <MicrosoftExtensionsSecurityHelperSourcesPackageVersion>2.1.0-preview1-27965</MicrosoftExtensionsSecurityHelperSourcesPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-26016-05</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-26102-01</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNetHttpHeadersPackageVersion>2.1.0-preview1-27965</MicrosoftNetHttpHeadersPackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
     <MicrosoftWebAdministrationPackageVersion>7.0.0</MicrosoftWebAdministrationPackageVersion>
-    <SystemBuffersPackageVersion>4.5.0-preview1-26016-05</SystemBuffersPackageVersion>
-    <SystemIOPipelinesPackageVersion>0.1.0-e171215-1</SystemIOPipelinesPackageVersion>
+    <SystemBuffersPackageVersion>4.5.0-preview1-26102-01</SystemBuffersPackageVersion>
+    <SystemIOPipelinesPackageVersion>0.1.0-e180104-2</SystemIOPipelinesPackageVersion>
     <SystemManagementAutomationPackageVersion>6.1.7601.17515</SystemManagementAutomationPackageVersion>
-    <SystemMemoryPackageVersion>4.5.0-preview1-26016-05</SystemMemoryPackageVersion>
-    <SystemNumericsVectorsPackageVersion>4.5.0-preview1-26016-05</SystemNumericsVectorsPackageVersion>
-    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview1-26016-05</SystemRuntimeCompilerServicesUnsafePackageVersion>
-    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview1-26016-05</SystemSecurityPrincipalWindowsPackageVersion>
-    <SystemTextEncodingsWebUtf8PackageVersion>0.1.0-e171215-1</SystemTextEncodingsWebUtf8PackageVersion>
+    <SystemMemoryPackageVersion>4.5.0-preview1-26102-01</SystemMemoryPackageVersion>
+    <SystemNumericsVectorsPackageVersion>4.5.0-preview1-26102-01</SystemNumericsVectorsPackageVersion>
+    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview1-26102-01</SystemRuntimeCompilerServicesUnsafePackageVersion>
+    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview1-26102-01</SystemSecurityPrincipalWindowsPackageVersion>
+    <SystemTextEncodingsWebUtf8PackageVersion>0.1.0-e180104-2</SystemTextEncodingsWebUtf8PackageVersion>
     <XunitPackageVersion>2.3.1</XunitPackageVersion>
     <XunitRunnerVisualStudioPackageVersion>2.3.1</XunitRunnerVisualStudioPackageVersion>
   </PropertyGroup>
diff --git a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs
index 5f1c6ac894..5536833474 100644
--- a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs
+++ b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs
@@ -141,8 +141,8 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
             RequestBody = new IISHttpRequestBody(this);
             ResponseBody = new IISHttpResponseBody(this);
 
-            Input = new Pipe(new PipeOptions(_memoryPool, readerScheduler: TaskRunScheduler.Default));
-            var pipe = new Pipe(new PipeOptions(_memoryPool,  readerScheduler: TaskRunScheduler.Default));
+            Input = new Pipe(new PipeOptions(_memoryPool, readerScheduler: Scheduler.TaskRun));
+            var pipe = new Pipe(new PipeOptions(_memoryPool,  readerScheduler: Scheduler.TaskRun));
             Output = new OutputProducer(pipe);
         }
 
@@ -162,7 +162,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
         public string RequestConnectionId { get; set; }
         public string TraceIdentifier { get; set; }
         public ClaimsPrincipal User { get; set; }
-        internal WindowsPrincipal WindowsUser { get; set; } 
+        internal WindowsPrincipal WindowsUser { get; set; }
         public Stream RequestBody { get; set; }
         public Stream ResponseBody { get; set; }
         public IPipe Input { get; set; }
@@ -561,7 +561,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
             Output.Reader.Complete();
         }
 
-        private unsafe IISAwaitable WriteAsync(ReadableBuffer buffer)
+        private unsafe IISAwaitable WriteAsync(ReadOnlyBuffer buffer)
         {
             var fCompletionExpected = false;
             var hr = 0;
diff --git a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/OutputProducer.cs b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/OutputProducer.cs
index d469dd4d88..91c664c5b3 100644
--- a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/OutputProducer.cs
+++ b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/OutputProducer.cs
@@ -110,7 +110,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
             return FlushAsyncAwaited(awaitable, cancellationToken);
         }
 
-        private async Task FlushAsyncAwaited(WritableBufferAwaitable awaitable, CancellationToken cancellationToken)
+        private async Task FlushAsyncAwaited(ValueAwaiter<FlushResult> awaitable, CancellationToken cancellationToken)
         {
             // https://github.com/dotnet/corefxlab/issues/1334
             // Since the flush awaitable doesn't currently support multiple awaiters